License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
author: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2017-11-01 15:07:57 +0100
committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2017-11-02 11:10:55 +0100
commit: b24413180f5600bcb3bb70fbed5cf186b60864bd (patch)
tree: 4ebcae0dab27ee8bfcecb9a5daf65353c6dd7ed6 /tools/perf
parent: bb176f67090ca54869fc1262c913aa69d2ede070 (diff)
download: op-kernel-dev-b24413180f5600bcb3bb70fbed5cf186b60864bd.zip
op-kernel-dev-b24413180f5600bcb3bb70fbed5cf186b60864bd.tar.gz
402 files changed, 402 insertions, 0 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 32a64e6..2254544 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # This is a simple wrapper Makefile that calls the main Makefile.perf
 # with a -j option to do parallel builds
diff --git a/tools/perf/arch/arm/annotate/instructions.c b/tools/perf/arch/arm/annotate/instructions.c
index 1ce0872..b39b163 100644
--- a/tools/perf/arch/arm/annotate/instructions.c
+++ b/tools/perf/arch/arm/annotate/instructions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <regex.h>
 
diff --git a/tools/perf/arch/arm/include/dwarf-regs-table.h b/tools/perf/arch/arm/include/dwarf-regs-table.h
index f298d03..5a45046 100644
--- a/tools/perf/arch/arm/include/dwarf-regs-table.h
+++ b/tools/perf/arch/arm/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h
index f619c9c..ed20e02 100644
--- a/tools/perf/arch/arm/include/perf_regs.h
+++ b/tools/perf/arch/arm/include/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_REGS_H
 #define ARCH_PERF_REGS_H
 
diff --git a/tools/perf/arch/arm/tests/dwarf-unwind.c b/tools/perf/arch/arm/tests/dwarf-unwind.c
index 62eff84..8cb3477 100644
--- a/tools/perf/arch/arm/tests/dwarf-unwind.c
+++ b/tools/perf/arch/arm/tests/dwarf-unwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "perf_regs.h"
 #include "thread.h"
diff --git a/tools/perf/arch/arm/tests/regs_load.S b/tools/perf/arch/arm/tests/regs_load.S
index e09e983..6e2495c 100644
--- a/tools/perf/arch/arm/tests/regs_load.S
+++ b/tools/perf/arch/arm/tests/regs_load.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/linkage.h>
 
 #define R0 0x00
diff --git a/tools/perf/arch/arm/util/unwind-libdw.c b/tools/perf/arch/arm/util/unwind-libdw.c
index bacfa00..36ba4c6 100644
--- a/tools/perf/arch/arm/util/unwind-libdw.c
+++ b/tools/perf/arch/arm/util/unwind-libdw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elfutils/libdwfl.h>
 #include "../../util/unwind-libdw.h"
 #include "../../util/perf_regs.h"
diff --git a/tools/perf/arch/arm/util/unwind-libunwind.c b/tools/perf/arch/arm/util/unwind-libunwind.c
index 62c397e..3a55022 100644
--- a/tools/perf/arch/arm/util/unwind-libunwind.c
+++ b/tools/perf/arch/arm/util/unwind-libunwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 
 #include <errno.h>
 #include <libunwind.h>
diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
index eebe1ec..91de486 100644
--- a/tools/perf/arch/arm64/Makefile
+++ b/tools/perf/arch/arm64/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
diff --git a/tools/perf/arch/arm64/annotate/instructions.c b/tools/perf/arch/arm64/annotate/instructions.c
index 8f19087..9a3e052 100644
--- a/tools/perf/arch/arm64/annotate/instructions.c
+++ b/tools/perf/arch/arm64/annotate/instructions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <regex.h>
 
diff --git a/tools/perf/arch/arm64/include/dwarf-regs-table.h b/tools/perf/arch/arm64/include/dwarf-regs-table.h
index 36e375f..177b285 100644
--- a/tools/perf/arch/arm64/include/dwarf-regs-table.h
+++ b/tools/perf/arch/arm64/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/arm64/include/perf_regs.h b/tools/perf/arch/arm64/include/perf_regs.h
index 4e5af27e3..baaa5e6 100644
--- a/tools/perf/arch/arm64/include/perf_regs.h
+++ b/tools/perf/arch/arm64/include/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_REGS_H
 #define ARCH_PERF_REGS_H
 
diff --git a/tools/perf/arch/arm64/tests/dwarf-unwind.c b/tools/perf/arch/arm64/tests/dwarf-unwind.c
index cf04a4c9..e907f0f 100644
--- a/tools/perf/arch/arm64/tests/dwarf-unwind.c
+++ b/tools/perf/arch/arm64/tests/dwarf-unwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "perf_regs.h"
 #include "thread.h"
diff --git a/tools/perf/arch/arm64/tests/regs_load.S b/tools/perf/arch/arm64/tests/regs_load.S
index 025b46e..0704251 100644
--- a/tools/perf/arch/arm64/tests/regs_load.S
+++ b/tools/perf/arch/arm64/tests/regs_load.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/linkage.h>
 
 .text
diff --git a/tools/perf/arch/arm64/util/unwind-libunwind.c b/tools/perf/arch/arm64/util/unwind-libunwind.c
index b415dfd..002520d 100644
--- a/tools/perf/arch/arm64/util/unwind-libunwind.c
+++ b/tools/perf/arch/arm64/util/unwind-libunwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 
 #ifndef REMOTE_UNWIND_LIBUNWIND
diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c
index 6b40e9f..8c0cfeb 100644
--- a/tools/perf/arch/common.c
+++ b/tools/perf/arch/common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <sys/utsname.h>
 #include "common.h"
diff --git a/tools/perf/arch/common.h b/tools/perf/arch/common.h
index 6b01c73..a154650 100644
--- a/tools/perf/arch/common.h
+++ b/tools/perf/arch/common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_COMMON_H
 #define ARCH_PERF_COMMON_H
 
diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile
index cc39309..42dab7c 100644
--- a/tools/perf/arch/powerpc/Makefile
+++ b/tools/perf/arch/powerpc/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
diff --git a/tools/perf/arch/powerpc/annotate/instructions.c b/tools/perf/arch/powerpc/annotate/instructions.c
index 3c4004d..b7bc049 100644
--- a/tools/perf/arch/powerpc/annotate/instructions.c
+++ b/tools/perf/arch/powerpc/annotate/instructions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name)
 {
 	int i;
diff --git a/tools/perf/arch/powerpc/include/arch-tests.h b/tools/perf/arch/powerpc/include/arch-tests.h
index 84d8ded..1c7be75 100644
--- a/tools/perf/arch/powerpc/include/arch-tests.h
+++ b/tools/perf/arch/powerpc/include/arch-tests.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_TESTS_H
 #define ARCH_TESTS_H
 
diff --git a/tools/perf/arch/powerpc/include/dwarf-regs-table.h b/tools/perf/arch/powerpc/include/dwarf-regs-table.h
index db4730f..66dc015 100644
--- a/tools/perf/arch/powerpc/include/dwarf-regs-table.h
+++ b/tools/perf/arch/powerpc/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/powerpc/include/perf_regs.h b/tools/perf/arch/powerpc/include/perf_regs.h
index c12f4e8..00e37b1 100644
--- a/tools/perf/arch/powerpc/include/perf_regs.h
+++ b/tools/perf/arch/powerpc/include/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_REGS_H
 #define ARCH_PERF_REGS_H
 
diff --git a/tools/perf/arch/powerpc/tests/arch-tests.c b/tools/perf/arch/powerpc/tests/arch-tests.c
index e24f462..8c3fbd4 100644
--- a/tools/perf/arch/powerpc/tests/arch-tests.c
+++ b/tools/perf/arch/powerpc/tests/arch-tests.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "tests/tests.h"
 #include "arch-tests.h"
diff --git a/tools/perf/arch/powerpc/tests/dwarf-unwind.c b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
index 0bac313..30cbbd6 100644
--- a/tools/perf/arch/powerpc/tests/dwarf-unwind.c
+++ b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "perf_regs.h"
 #include "thread.h"
diff --git a/tools/perf/arch/powerpc/tests/regs_load.S b/tools/perf/arch/powerpc/tests/regs_load.S
index d76c9a3..36a20b0 100644
--- a/tools/perf/arch/powerpc/tests/regs_load.S
+++ b/tools/perf/arch/powerpc/tests/regs_load.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/linkage.h>
 
 /* Offset is based on macros from arch/powerpc/include/uapi/asm/ptrace.h. */
diff --git a/tools/perf/arch/powerpc/util/book3s_hcalls.h b/tools/perf/arch/powerpc/util/book3s_hcalls.h
index 0dd6b7f..54cfa05 100644
--- a/tools/perf/arch/powerpc/util/book3s_hcalls.h
+++ b/tools/perf/arch/powerpc/util/book3s_hcalls.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_BOOK3S_HV_HCALLS_H
 #define ARCH_PERF_BOOK3S_HV_HCALLS_H
 
diff --git a/tools/perf/arch/powerpc/util/book3s_hv_exits.h b/tools/perf/arch/powerpc/util/book3s_hv_exits.h
index e68ba2d..853b95d1 100644
--- a/tools/perf/arch/powerpc/util/book3s_hv_exits.h
+++ b/tools/perf/arch/powerpc/util/book3s_hv_exits.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_BOOK3S_HV_EXITS_H
 #define ARCH_PERF_BOOK3S_HV_EXITS_H
 
diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
index 9aaa6f5..7a4cf80 100644
--- a/tools/perf/arch/powerpc/util/header.c
+++ b/tools/perf/arch/powerpc/util/header.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/perf/arch/powerpc/util/kvm-stat.c b/tools/perf/arch/powerpc/util/kvm-stat.c
index 249723f..596ad6a 100644
--- a/tools/perf/arch/powerpc/util/kvm-stat.c
+++ b/tools/perf/arch/powerpc/util/kvm-stat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include "util/kvm-stat.h"
 #include "util/parse-events.h"
diff --git a/tools/perf/arch/powerpc/util/perf_regs.c b/tools/perf/arch/powerpc/util/perf_regs.c
index f860dc41..ec50939 100644
--- a/tools/perf/arch/powerpc/util/perf_regs.c
+++ b/tools/perf/arch/powerpc/util/perf_regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <string.h>
 #include <regex.h>
diff --git a/tools/perf/arch/powerpc/util/unwind-libdw.c b/tools/perf/arch/powerpc/util/unwind-libdw.c
index 3a24b3c..7a1f05e 100644
--- a/tools/perf/arch/powerpc/util/unwind-libdw.c
+++ b/tools/perf/arch/powerpc/util/unwind-libdw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elfutils/libdwfl.h>
 #include "../../util/unwind-libdw.h"
 #include "../../util/perf_regs.h"
diff --git a/tools/perf/arch/s390/annotate/instructions.c b/tools/perf/arch/s390/annotate/instructions.c
index 745b4b1..c9a8167 100644
--- a/tools/perf/arch/s390/annotate/instructions.c
+++ b/tools/perf/arch/s390/annotate/instructions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 static struct ins_ops *s390__associate_ins_ops(struct arch *arch, const char *name)
 {
 	struct ins_ops *ops = NULL;
diff --git a/tools/perf/arch/s390/include/dwarf-regs-table.h b/tools/perf/arch/s390/include/dwarf-regs-table.h
index 9da74a9..792d4c2 100644
--- a/tools/perf/arch/s390/include/dwarf-regs-table.h
+++ b/tools/perf/arch/s390/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/s390/util/dwarf-regs.c b/tools/perf/arch/s390/util/dwarf-regs.c
index 0469df0..0dff5b2 100644
--- a/tools/perf/arch/s390/util/dwarf-regs.c
+++ b/tools/perf/arch/s390/util/dwarf-regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Mapping of DWARF debug register numbers into register names.
  *
diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c
index b9a95a1..0b20540 100644
--- a/tools/perf/arch/s390/util/machine.c
+++ b/tools/perf/arch/s390/util/machine.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <unistd.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/perf/arch/sh/include/dwarf-regs-table.h b/tools/perf/arch/sh/include/dwarf-regs-table.h
index 3a2deaf..900e696 100644
--- a/tools/perf/arch/sh/include/dwarf-regs-table.h
+++ b/tools/perf/arch/sh/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/sparc/include/dwarf-regs-table.h b/tools/perf/arch/sparc/include/dwarf-regs-table.h
index 12c0761..35ede84 100644
--- a/tools/perf/arch/sparc/include/dwarf-regs-table.h
+++ b/tools/perf/arch/sparc/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 9a628a2..d74eaa7 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
diff --git a/tools/perf/arch/x86/annotate/instructions.c b/tools/perf/arch/x86/annotate/instructions.c
index d84b720..4adfb4c 100644
--- a/tools/perf/arch/x86/annotate/instructions.c
+++ b/tools/perf/arch/x86/annotate/instructions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 static struct ins x86__instructions[] = {
 	{ .name = "add",	.ops = &mov_ops,  },
 	{ .name = "addl",	.ops = &mov_ops,  },
diff --git a/tools/perf/arch/x86/entry/syscalls/syscalltbl.sh b/tools/perf/arch/x86/entry/syscalls/syscalltbl.sh
index 49a18b9..029a72c 100755
--- a/tools/perf/arch/x86/entry/syscalls/syscalltbl.sh
+++ b/tools/perf/arch/x86/entry/syscalls/syscalltbl.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
 
 in="$1"
 arch="$2"
diff --git a/tools/perf/arch/x86/include/arch-tests.h b/tools/perf/arch/x86/include/arch-tests.h
index 4e0b806..9834fdc 100644
--- a/tools/perf/arch/x86/include/arch-tests.h
+++ b/tools/perf/arch/x86/include/arch-tests.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_TESTS_H
 #define ARCH_TESTS_H
 
diff --git a/tools/perf/arch/x86/include/dwarf-regs-table.h b/tools/perf/arch/x86/include/dwarf-regs-table.h
index 9b5e5cb..b9bd5dc 100644
--- a/tools/perf/arch/x86/include/dwarf-regs-table.h
+++ b/tools/perf/arch/x86/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h
index 7df517a..7f6d538 100644
--- a/tools/perf/arch/x86/include/perf_regs.h
+++ b/tools/perf/arch/x86/include/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ARCH_PERF_REGS_H
 #define ARCH_PERF_REGS_H
 
diff --git a/tools/perf/arch/x86/tests/arch-tests.c b/tools/perf/arch/x86/tests/arch-tests.c
index 99d6619..34a0781 100644
--- a/tools/perf/arch/x86/tests/arch-tests.c
+++ b/tools/perf/arch/x86/tests/arch-tests.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "tests/tests.h"
 #include "arch-tests.h"
diff --git a/tools/perf/arch/x86/tests/dwarf-unwind.c b/tools/perf/arch/x86/tests/dwarf-unwind.c
index 7f209ce..95036c7 100644
--- a/tools/perf/arch/x86/tests/dwarf-unwind.c
+++ b/tools/perf/arch/x86/tests/dwarf-unwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "perf_regs.h"
 #include "thread.h"
diff --git a/tools/perf/arch/x86/tests/insn-x86-dat-32.c b/tools/perf/arch/x86/tests/insn-x86-dat-32.c
index 3cbf6fa..fab3c6d 100644
--- a/tools/perf/arch/x86/tests/insn-x86-dat-32.c
+++ b/tools/perf/arch/x86/tests/insn-x86-dat-32.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generated by gen-insn-x86-dat.sh and gen-insn-x86-dat.awk
  * from insn-x86-dat-src.c for inclusion by insn-x86.c
diff --git a/tools/perf/arch/x86/tests/insn-x86-dat-64.c b/tools/perf/arch/x86/tests/insn-x86-dat-64.c
index aa512fa..c57f346 100644
--- a/tools/perf/arch/x86/tests/insn-x86-dat-64.c
+++ b/tools/perf/arch/x86/tests/insn-x86-dat-64.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generated by gen-insn-x86-dat.sh and gen-insn-x86-dat.awk
  * from insn-x86-dat-src.c for inclusion by insn-x86.c
diff --git a/tools/perf/arch/x86/tests/insn-x86-dat-src.c b/tools/perf/arch/x86/tests/insn-x86-dat-src.c
index 6cdb65d..891415b 100644
--- a/tools/perf/arch/x86/tests/insn-x86-dat-src.c
+++ b/tools/perf/arch/x86/tests/insn-x86-dat-src.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains instructions for testing by the test titled:
  *
diff --git a/tools/perf/arch/x86/tests/insn-x86.c b/tools/perf/arch/x86/tests/insn-x86.c
index b386058..a5d24ae5 100644
--- a/tools/perf/arch/x86/tests/insn-x86.c
+++ b/tools/perf/arch/x86/tests/insn-x86.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 
 #include "debug.h"
diff --git a/tools/perf/arch/x86/tests/intel-cqm.c b/tools/perf/arch/x86/tests/intel-cqm.c
index 57f86b6..90a4a8c 100644
--- a/tools/perf/arch/x86/tests/intel-cqm.c
+++ b/tools/perf/arch/x86/tests/intel-cqm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "tests/tests.h"
 #include "perf.h"
 #include "cloexec.h"
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 5dd7efb..b59678e 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <stdio.h>
diff --git a/tools/perf/arch/x86/tests/rdpmc.c b/tools/perf/arch/x86/tests/rdpmc.c
index 17fec30..7a11f02 100644
--- a/tools/perf/arch/x86/tests/rdpmc.c
+++ b/tools/perf/arch/x86/tests/rdpmc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/tools/perf/arch/x86/tests/regs_load.S b/tools/perf/arch/x86/tests/regs_load.S
index 60875d5..bbe5a0d 100644
--- a/tools/perf/arch/x86/tests/regs_load.S
+++ b/tools/perf/arch/x86/tests/regs_load.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/linkage.h>
 
 #define AX	 0
diff --git a/tools/perf/arch/x86/util/group.c b/tools/perf/arch/x86/util/group.c
index 37f92aa..e2f8034 100644
--- a/tools/perf/arch/x86/util/group.c
+++ b/tools/perf/arch/x86/util/group.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include "api/fs/fs.h"
 #include "util/group.h"
diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c
index a74a48d..33027c5 100644
--- a/tools/perf/arch/x86/util/header.c
+++ b/tools/perf/arch/x86/util/header.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/perf/arch/x86/util/kvm-stat.c b/tools/perf/arch/x86/util/kvm-stat.c
index bf817be..b32409a 100644
--- a/tools/perf/arch/x86/util/kvm-stat.c
+++ b/tools/perf/arch/x86/util/kvm-stat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include "../../util/kvm-stat.h"
 #include <asm/svm.h>
diff --git a/tools/perf/arch/x86/util/perf_regs.c b/tools/perf/arch/x86/util/perf_regs.c
index f95edeb..4b2caf6 100644
--- a/tools/perf/arch/x86/util/perf_regs.c
+++ b/tools/perf/arch/x86/util/perf_regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <string.h>
 #include <regex.h>
diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
index 79fe071..63a74c3 100644
--- a/tools/perf/arch/x86/util/pmu.c
+++ b/tools/perf/arch/x86/util/pmu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 
 #include <linux/perf_event.h>
diff --git a/tools/perf/arch/x86/util/tsc.c b/tools/perf/arch/x86/util/tsc.c
index 2e5567c..06bae70 100644
--- a/tools/perf/arch/x86/util/tsc.c
+++ b/tools/perf/arch/x86/util/tsc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <errno.h>
 
diff --git a/tools/perf/arch/x86/util/unwind-libdw.c b/tools/perf/arch/x86/util/unwind-libdw.c
index 38dc9bb..fda8f42 100644
--- a/tools/perf/arch/x86/util/unwind-libdw.c
+++ b/tools/perf/arch/x86/util/unwind-libdw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elfutils/libdwfl.h>
 #include "../../util/unwind-libdw.h"
 #include "../../util/perf_regs.h"
diff --git a/tools/perf/arch/x86/util/unwind-libunwind.c b/tools/perf/arch/x86/util/unwind-libunwind.c
index 4f16661..9c917f8 100644
--- a/tools/perf/arch/x86/util/unwind-libunwind.c
+++ b/tools/perf/arch/x86/util/unwind-libunwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 
 #ifndef REMOTE_UNWIND_LIBUNWIND
 #include <errno.h>
diff --git a/tools/perf/arch/xtensa/include/dwarf-regs-table.h b/tools/perf/arch/xtensa/include/dwarf-regs-table.h
index aa0444a..d7c9f1f 100644
--- a/tools/perf/arch/xtensa/include/dwarf-regs-table.h
+++ b/tools/perf/arch/xtensa/include/dwarf-regs-table.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifdef DEFINE_DWARF_REGSTR_TABLE
 /* This is included in perf/util/dwarf-regs.c */
 
diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 842ab27..6c9fcd7 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef BENCH_H
 #define BENCH_H
 
diff --git a/tools/perf/bench/futex-hash.c b/tools/perf/bench/futex-hash.c
index fe16b31..58ae6ed 100644
--- a/tools/perf/bench/futex-hash.c
+++ b/tools/perf/bench/futex-hash.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2013  Davidlohr Bueso <davidlohr@hp.com>
  *
diff --git a/tools/perf/bench/futex-lock-pi.c b/tools/perf/bench/futex-lock-pi.c
index 73a1c44..08653ae 100644
--- a/tools/perf/bench/futex-lock-pi.c
+++ b/tools/perf/bench/futex-lock-pi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Davidlohr Bueso.
  */
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c
index 41786cb..1058c19 100644
--- a/tools/perf/bench/futex-requeue.c
+++ b/tools/perf/bench/futex-requeue.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2013  Davidlohr Bueso <davidlohr@hp.com>
  *
diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c
index 4ab12c8..b4732da 100644
--- a/tools/perf/bench/futex-wake-parallel.c
+++ b/tools/perf/bench/futex-wake-parallel.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Davidlohr Bueso.
  *
diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c
index 2fa4922..8c5c0b6 100644
--- a/tools/perf/bench/futex-wake.c
+++ b/tools/perf/bench/futex-wake.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2013  Davidlohr Bueso <davidlohr@hp.com>
  *
diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h
index e44fd32..db4853f 100644
--- a/tools/perf/bench/futex.h
+++ b/tools/perf/bench/futex.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Glibc independent futex library for testing kernel functionality.
  * Shamelessly stolen from Darren Hart <dvhltc@us.ibm.com>
diff --git a/tools/perf/bench/mem-functions.c b/tools/perf/bench/mem-functions.c
index fbd732b..0251dd3 100644
--- a/tools/perf/bench/mem-functions.c
+++ b/tools/perf/bench/mem-functions.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * mem-memcpy.c
  *
diff --git a/tools/perf/bench/mem-memcpy-arch.h b/tools/perf/bench/mem-memcpy-arch.h
index 5aad2a9..5bcaec5 100644
--- a/tools/perf/bench/mem-memcpy-arch.h
+++ b/tools/perf/bench/mem-memcpy-arch.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
 
diff --git a/tools/perf/bench/mem-memcpy-x86-64-asm-def.h b/tools/perf/bench/mem-memcpy-x86-64-asm-def.h
index 8c0c1a2..50ae8bd 100644
--- a/tools/perf/bench/mem-memcpy-x86-64-asm-def.h
+++ b/tools/perf/bench/mem-memcpy-x86-64-asm-def.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 MEMCPY_FN(memcpy_orig,
 	"x86-64-unrolled",
diff --git a/tools/perf/bench/mem-memcpy-x86-64-asm.S b/tools/perf/bench/mem-memcpy-x86-64-asm.S
index f700369..b43f8d2 100644
--- a/tools/perf/bench/mem-memcpy-x86-64-asm.S
+++ b/tools/perf/bench/mem-memcpy-x86-64-asm.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 /* Various wrappers to make the kernel .S file build in user-space: */
 
diff --git a/tools/perf/bench/mem-memset-arch.h b/tools/perf/bench/mem-memset-arch.h
index 0d15786..53f4548 100644
--- a/tools/perf/bench/mem-memset-arch.h
+++ b/tools/perf/bench/mem-memset-arch.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
 
diff --git a/tools/perf/bench/mem-memset-x86-64-asm-def.h b/tools/perf/bench/mem-memset-x86-64-asm-def.h
index f02d028..dac6d2b 100644
--- a/tools/perf/bench/mem-memset-x86-64-asm-def.h
+++ b/tools/perf/bench/mem-memset-x86-64-asm-def.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 MEMSET_FN(memset_orig,
 	"x86-64-unrolled",
diff --git a/tools/perf/bench/mem-memset-x86-64-asm.S b/tools/perf/bench/mem-memset-x86-64-asm.S
index 58407aa..d550bd5 100644
--- a/tools/perf/bench/mem-memset-x86-64-asm.S
+++ b/tools/perf/bench/mem-memset-x86-64-asm.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #define memset MEMSET /* don't hide glibc's memset() */
 #define altinstr_replacement text
 #define globl p2align 4; .globl
diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index 469d65b..d95fdcc 100644
--- a/tools/perf/bench/numa.c
+++ b/tools/perf/bench/numa.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * numa.c
  *
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index 4f961e7..f9d7641 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *
  * sched-messaging.c
diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index a152737..0591be0 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *
  * sched-pipe.c
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index c383731..3d32aa4 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-annotate.c
  *
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index 445e628..17a6bcd 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-bench.c
  *
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index e3eb624..5f53a7a 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-buildid-cache.c
  *
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index fdaca16..ec2f327 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-buildid-list.c
  *
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 475999e..fd32ad0 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This is rewrite of original c2c tool introduced in here:
  *   http://lwn.net/Articles/588866/
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index a1d82e3..abfa49e 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-config.c
  *
diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
index 46cd849..dde25d4 100644
--- a/tools/perf/builtin-data.c
+++ b/tools/perf/builtin-data.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include "builtin.h"
 #include "perf.h"
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 0cd4cf6..56223bd 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-diff.c
  *
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index 6d210e4..cdd1456 100644
--- a/tools/perf/builtin-evlist.c
+++ b/tools/perf/builtin-evlist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Builtin evlist command: Show the list of event selectors present
  * in a perf.data file.
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index dbe4e41..bd1fede 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-help.c
  *
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 2b80329..3e0e73b 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-inject.c
  *
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 24ee68e..35d4b9c 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
 #include "perf.h"
 
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index f309c37..5fb4036 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
 #include "perf.h"
 
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 4bf2cb4..eeedbe4 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-list.c
  *
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index ff98652..fe69cd6 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include "builtin.h"
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 0f15634..4db9600 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 56f8142..0c95ffe 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-record.c
  *
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index f9dff65..fae4b03 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-report.c
  *
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 322b4de..f380d91 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
 #include "perf.h"
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 0c977b6..0fe0275 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
 
 #include "perf.h"
diff --git a/tools/perf/builtin-version.c b/tools/perf/builtin-version.c
index d251494..37019c5 100644
--- a/tools/perf/builtin-version.c
+++ b/tools/perf/builtin-version.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
 #include "perf.h"
 #include <linux/compiler.h>
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index d4d19fe..05745f3 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef BUILTIN_H
 #define BUILTIN_H
 
diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
index 932fda5..50cd622 100755
--- a/tools/perf/check-headers.sh
+++ b/tools/perf/check-headers.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
 
 HEADERS='
 include/uapi/drm/drm.h
diff --git a/tools/perf/jvmti/jvmti_agent.h b/tools/perf/jvmti/jvmti_agent.h
index c53a41f..fe32d83 100644
--- a/tools/perf/jvmti/jvmti_agent.h
+++ b/tools/perf/jvmti/jvmti_agent.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __JVMTI_AGENT_H__
 #define __JVMTI_AGENT_H__
 
diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c
index 6d71090..c62c9fc 100644
--- a/tools/perf/jvmti/libjvmti.c
+++ b/tools/perf/jvmti/libjvmti.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <sys/types.h>
 #include <stdio.h>
diff --git a/tools/perf/perf-archive.sh b/tools/perf/perf-archive.sh
index e919306..0cfb3e2 100644
--- a/tools/perf/perf-archive.sh
+++ b/tools/perf/perf-archive.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
 # perf archive
 # Arnaldo Carvalho de Melo <acme@redhat.com>
 
diff --git a/tools/perf/perf-completion.sh b/tools/perf/perf-completion.sh
index 3ba80b2..345f5d6 100644
--- a/tools/perf/perf-completion.sh
+++ b/tools/perf/perf-completion.sh
@@ -1,4 +1,5 @@
 # perf bash and zsh completion
+# SPDX-License-Identifier: GPL-2.0
 
 # Taken from git.git's completion script.
 __my_reassemble_comp_words_by_ref()
diff --git a/tools/perf/perf-read-vdso.c b/tools/perf/perf-read-vdso.c
index 764e254..8c0ca0c 100644
--- a/tools/perf/perf-read-vdso.c
+++ b/tools/perf/perf-read-vdso.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <string.h>
 
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index c11f0c7..36673f9 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_SYS_H
 #define _PERF_SYS_H
 
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2f19e03..62b1351 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * perf.c
  *
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index dc442ba..f75f3de 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_PERF_H
 #define _PERF_PERF_H
 
diff --git a/tools/perf/pmu-events/jevents.h b/tools/perf/pmu-events/jevents.h
index 611fac0..d87efd2 100644
--- a/tools/perf/pmu-events/jevents.h
+++ b/tools/perf/pmu-events/jevents.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef JEVENTS_H
 #define JEVENTS_H 1
 
diff --git a/tools/perf/pmu-events/jsmn.h b/tools/perf/pmu-events/jsmn.h
index d666b10..c7b0f6e 100644
--- a/tools/perf/pmu-events/jsmn.h
+++ b/tools/perf/pmu-events/jsmn.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __JSMN_H_
 #define __JSMN_H_
 
diff --git a/tools/perf/pmu-events/json.h b/tools/perf/pmu-events/json.h
index 278ebd3..fbcd5a0 100644
--- a/tools/perf/pmu-events/json.h
+++ b/tools/perf/pmu-events/json.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef JSON_H
 #define JSON_H 1
 
diff --git a/tools/perf/pmu-events/pmu-events.h b/tools/perf/pmu-events/pmu-events.h
index 569eab3..e08789d 100644
--- a/tools/perf/pmu-events/pmu-events.h
+++ b/tools/perf/pmu-events/pmu-events.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PMU_EVENTS_H
 #define PMU_EVENTS_H
 
diff --git a/tools/perf/python/tracepoint.py b/tools/perf/python/tracepoint.py
index eb4dbed..eb76f65 100755
--- a/tools/perf/python/tracepoint.py
+++ b/tools/perf/python/tracepoint.py
@@ -1,4 +1,5 @@
 #! /usr/bin/python
+# SPDX-License-Identifier: GPL-2.0
 # -*- python -*-
 # -*- coding: utf-8 -*-
 
diff --git a/tools/perf/scripts/perl/Perf-Trace-Util/Makefile.PL b/tools/perf/scripts/perl/Perf-Trace-Util/Makefile.PL
index decdeb0..e899433 100644
--- a/tools/perf/scripts/perl/Perf-Trace-Util/Makefile.PL
+++ b/tools/perf/scripts/perl/Perf-Trace-Util/Makefile.PL
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 use 5.010000;
 use ExtUtils::MakeMaker;
 # See lib/ExtUtils/MakeMaker.pm for details of how to influence
diff --git a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
index 9e098579..81a56cd 100755
--- a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
+++ b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
@@ -1,4 +1,5 @@
 # EventClass.py
+# SPDX-License-Identifier: GPL-2.0
 #
 # This is a library defining some events types classes, which could
 # be used by other scripts to analyzing the perf samples.
diff --git a/tools/perf/scripts/python/event_analyzing_sample.py b/tools/perf/scripts/python/event_analyzing_sample.py
index 163c39f..4e843b9 100644
--- a/tools/perf/scripts/python/event_analyzing_sample.py
+++ b/tools/perf/scripts/python/event_analyzing_sample.py
@@ -1,4 +1,5 @@
 # event_analyzing_sample.py: general event handler in python
+# SPDX-License-Identifier: GPL-2.0
 #
 # Current perf report is already very powerful with the annotation integrated,
 # and this script is not trying to be as powerful as perf report, but
diff --git a/tools/perf/scripts/python/net_dropmonitor.py b/tools/perf/scripts/python/net_dropmonitor.py
index 0b6ce8c..a150164 100755
--- a/tools/perf/scripts/python/net_dropmonitor.py
+++ b/tools/perf/scripts/python/net_dropmonitor.py
@@ -1,4 +1,5 @@
 # Monitor the system for dropped packets and proudce a report of drop locations and counts
+# SPDX-License-Identifier: GPL-2.0
 
 import os
 import sys
diff --git a/tools/perf/scripts/python/netdev-times.py b/tools/perf/scripts/python/netdev-times.py
index 4c6f09a..9b2050f 100644
--- a/tools/perf/scripts/python/netdev-times.py
+++ b/tools/perf/scripts/python/netdev-times.py
@@ -1,4 +1,5 @@
 # Display a process of packets and processed time.
+# SPDX-License-Identifier: GPL-2.0
 # It helps us to investigate networking or network device.
 #
 # options
diff --git a/tools/perf/scripts/python/stackcollapse.py b/tools/perf/scripts/python/stackcollapse.py
index 5a605f7..1697b5e 100755
--- a/tools/perf/scripts/python/stackcollapse.py
+++ b/tools/perf/scripts/python/stackcollapse.py
@@ -1,4 +1,5 @@
 # stackcollapse.py - format perf samples with one line per distinct call stack
+# SPDX-License-Identifier: GPL-2.0
 #
 # This script's output has two space-separated fields.  The first is a semicolon
 # separated stack including the program name (from the "comm" field) and the
diff --git a/tools/perf/scripts/python/stat-cpi.py b/tools/perf/scripts/python/stat-cpi.py
index 8b60f34..8410672 100644
--- a/tools/perf/scripts/python/stat-cpi.py
+++ b/tools/perf/scripts/python/stat-cpi.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# SPDX-License-Identifier: GPL-2.0
 
 data    = {}
 times   = []
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
index c9aafed..c180bbc 100644
--- a/tools/perf/tests/attr.c
+++ b/tools/perf/tests/attr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * The struct perf_event_attr test support.
  *
diff --git a/tools/perf/tests/attr.py b/tools/perf/tests/attr.py
index 6bb50e8..907b1b2 100644
--- a/tools/perf/tests/attr.py
+++ b/tools/perf/tests/attr.py
@@ -1,4 +1,5 @@
 #! /usr/bin/python
+# SPDX-License-Identifier: GPL-2.0
 
 import os
 import sys
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index d233ad3..71b9a0b 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Test backward bit in event attribute, read ring buffer from end to
  * beginning
diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 0d7c065..47bedf2 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/bitmap.h>
 #include "tests.h"
diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c
index 97937e1..335b695 100644
--- a/tools/perf/tests/bp_signal.c
+++ b/tools/perf/tests/bp_signal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Inspired by breakpoint overflow test done by
  * Vince Weaver <vincent.weaver@maine.edu> for perf_event_tests
diff --git a/tools/perf/tests/bp_signal_overflow.c b/tools/perf/tests/bp_signal_overflow.c
index 61ecd80..ca962559 100644
--- a/tools/perf/tests/bp_signal_overflow.c
+++ b/tools/perf/tests/bp_signal_overflow.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Originally done by Vince Weaver <vincent.weaver@maine.edu> for
  * perf_event_tests (git://github.com/deater/perf_event_tests)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 377bea0..53d06f3 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-test.c
  *
diff --git a/tools/perf/tests/clang.c b/tools/perf/tests/clang.c
index c60ec91..f45fe11 100644
--- a/tools/perf/tests/clang.c
+++ b/tools/perf/tests/clang.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "tests.h"
 #include "debug.h"
 #include "util.h"
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 466a462..fcc8984 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
diff --git a/tools/perf/tests/cpumap.c b/tools/perf/tests/cpumap.c
index 1997022..e78b897 100644
--- a/tools/perf/tests/cpumap.c
+++ b/tools/perf/tests/cpumap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "tests.h"
 #include <stdio.h>
 #include "cpumap.h"
diff --git a/tools/perf/tests/dso-data.c b/tools/perf/tests/dso-data.c
index 30aead4..7f6c520 100644
--- a/tools/perf/tests/dso-data.c
+++ b/tools/perf/tests/dso-data.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <stdlib.h>
 #include <linux/kernel.h>
diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c
index 9ba1d21..ac40e05 100644
--- a/tools/perf/tests/dwarf-unwind.c
+++ b/tools/perf/tests/dwarf-unwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <inttypes.h>
diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c
index b82b981..1a2686f 100644
--- a/tools/perf/tests/event-times.c
+++ b/tools/perf/tests/event-times.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <errno.h>
 #include <inttypes.h>
diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
index 9484da2..f14dcd6 100644
--- a/tools/perf/tests/event_update.c
+++ b/tools/perf/tests/event_update.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include "evlist.h"
 #include "evsel.h"
diff --git a/tools/perf/tests/evsel-roundtrip-name.c b/tools/perf/tests/evsel-roundtrip-name.c
index d32759b..a104728 100644
--- a/tools/perf/tests/evsel-roundtrip-name.c
+++ b/tools/perf/tests/evsel-roundtrip-name.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "evlist.h"
 #include "evsel.h"
 #include "parse-events.h"
diff --git a/tools/perf/tests/evsel-tp-sched.c b/tools/perf/tests/evsel-tp-sched.c
index 5fc906d..699561f 100644
--- a/tools/perf/tests/evsel-tp-sched.c
+++ b/tools/perf/tests/evsel-tp-sched.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/err.h>
 #include <traceevent/event-parse.h>
 #include "evsel.h"
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index cb251bf..01f0706 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util/debug.h"
 #include "util/expr.h"
 #include "tests.h"
diff --git a/tools/perf/tests/fdarray.c b/tools/perf/tests/fdarray.c
index 7d3a9e2..c7c81c4 100644
--- a/tools/perf/tests/fdarray.c
+++ b/tools/perf/tests/fdarray.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <api/fd/array.h>
 #include <poll.h>
 #include "util/debug.h"
diff --git a/tools/perf/tests/hists_common.c b/tools/perf/tests/hists_common.c
index 00b8dc5..f7c5b61 100644
--- a/tools/perf/tests/hists_common.c
+++ b/tools/perf/tests/hists_common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include "perf.h"
 #include "util/debug.h"
diff --git a/tools/perf/tests/hists_common.h b/tools/perf/tests/hists_common.h
index 888254e..a2de0ff 100644
--- a/tools/perf/tests/hists_common.h
+++ b/tools/perf/tests/hists_common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_TESTS__HISTS_COMMON_H__
 #define __PERF_TESTS__HISTS_COMMON_H__
 
diff --git a/tools/perf/tests/hists_cumulate.c b/tools/perf/tests/hists_cumulate.c
index 8d19c02..65fe02b 100644
--- a/tools/perf/tests/hists_cumulate.c
+++ b/tools/perf/tests/hists_cumulate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "util/debug.h"
 #include "util/event.h"
diff --git a/tools/perf/tests/hists_filter.c b/tools/perf/tests/hists_filter.c
index 755ca55..1c5beda 100644
--- a/tools/perf/tests/hists_filter.c
+++ b/tools/perf/tests/hists_filter.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "util/debug.h"
 #include "util/symbol.h"
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index 073c9c2..9a9d06c 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "tests.h"
 #include "debug.h"
diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
index 282d62e..faacb4f 100644
--- a/tools/perf/tests/hists_output.c
+++ b/tools/perf/tests/hists_output.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "util/debug.h"
 #include "util/event.h"
diff --git a/tools/perf/tests/is_printable_array.c b/tools/perf/tests/is_printable_array.c
index 38f7657..9c7b3ba 100644
--- a/tools/perf/tests/is_printable_array.c
+++ b/tools/perf/tests/is_printable_array.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include "tests.h"
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 7394286..842d336 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 #include <unistd.h>
 #include <sys/prctl.h>
diff --git a/tools/perf/tests/kmod-path.c b/tools/perf/tests/kmod-path.c
index 8b9d4ba..8e57d46 100644
--- a/tools/perf/tests/kmod-path.c
+++ b/tools/perf/tests/kmod-path.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <stdlib.h>
 #include "tests.h"
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index 5187b50d..a039f93 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <bpf/libbpf.h>
 #include <util/llvm-utils.h>
diff --git a/tools/perf/tests/llvm.h b/tools/perf/tests/llvm.h
index b835717..f68b0d9 100644
--- a/tools/perf/tests/llvm.h
+++ b/tools/perf/tests/llvm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_TEST_LLVM_H
 #define PERF_TEST_LLVM_H
 
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index bc8a70e..5a8bf31 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 /* For the CLR_() macros */
diff --git a/tools/perf/tests/mmap-thread-lookup.c b/tools/perf/tests/mmap-thread-lookup.c
index f94a419..3c3f3e0 100644
--- a/tools/perf/tests/mmap-thread-lookup.c
+++ b/tools/perf/tests/mmap-thread-lookup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <unistd.h>
 #include <sys/syscall.h>
diff --git a/tools/perf/tests/openat-syscall-all-cpus.c b/tools/perf/tests/openat-syscall-all-cpus.c
index 9cf1c35..c531e6d 100644
--- a/tools/perf/tests/openat-syscall-all-cpus.c
+++ b/tools/perf/tests/openat-syscall-all-cpus.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 /* For the CPU_* macros */
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index b6ee1c4..d9619d2 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/err.h>
 #include "perf.h"
 #include "evlist.h"
diff --git a/tools/perf/tests/openat-syscall.c b/tools/perf/tests/openat-syscall.c
index 9dc5c5d..00cd63f 100644
--- a/tools/perf/tests/openat-syscall.c
+++ b/tools/perf/tests/openat-syscall.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <api/fs/tracing_path.h>
diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 0f0b025..f067961 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "parse-events.h"
 #include "evsel.h"
 #include "evlist.h"
diff --git a/tools/perf/tests/parse-no-sample-id-all.c b/tools/perf/tests/parse-no-sample-id-all.c
index 91867dc..2196d14 100644
--- a/tools/perf/tests/parse-no-sample-id-all.c
+++ b/tools/perf/tests/parse-no-sample-id-all.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <stddef.h>
diff --git a/tools/perf/tests/perf-hooks.c b/tools/perf/tests/perf-hooks.c
index bf2517d..a693bcf 100644
--- a/tools/perf/tests/perf-hooks.c
+++ b/tools/perf/tests/perf-hooks.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <signal.h>
 #include <stdlib.h>
 
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 19b6500..c34904d 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 /* For the CLR_() macros */
diff --git a/tools/perf/tests/perf-targz-src-pkg b/tools/perf/tests/perf-targz-src-pkg
index f2d9c5f..fae26b1 100755
--- a/tools/perf/tests/perf-targz-src-pkg
+++ b/tools/perf/tests/perf-targz-src-pkg
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
 # Test one of the main kernel Makefile targets to generate a perf sources tarball
 # suitable for build outside the full kernel sources.
 #
diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index 9f7f589..9abca26 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "parse-events.h"
 #include "pmu.h"
 #include "util.h"
diff --git a/tools/perf/tests/python-use.c b/tools/perf/tests/python-use.c
index 598a7e0..5d2df65 100644
--- a/tools/perf/tests/python-use.c
+++ b/tools/perf/tests/python-use.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Just test if we can load the python binding.
  */
diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
index c385848..3ec6302 100644
--- a/tools/perf/tests/sample-parsing.c
+++ b/tools/perf/tests/sample-parsing.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <inttypes.h>
 #include <linux/kernel.h>
diff --git a/tools/perf/tests/sdt.c b/tools/perf/tests/sdt.c
index a9903d9..5059452 100644
--- a/tools/perf/tests/sdt.c
+++ b/tools/perf/tests/sdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <stdio.h>
 #include <sys/epoll.h>
diff --git a/tools/perf/tests/stat.c b/tools/perf/tests/stat.c
index 7f988a9..9425002 100644
--- a/tools/perf/tests/stat.c
+++ b/tools/perf/tests/stat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include "event.h"
 #include "tests.h"
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index d88511f..725a196 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <unistd.h>
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 2acd785..7d3f4bf 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/time.h>
 #include <sys/prctl.h>
 #include <errno.h>
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index f0881d0..bc4a734 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "evlist.h"
 #include "evsel.h"
 #include "thread_map.h"
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 921412a..2862b80 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef TESTS_H
 #define TESTS_H
 
diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c
index b3423c7..dbcb6a1 100644
--- a/tools/perf/tests/thread-map.c
+++ b/tools/perf/tests/thread-map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdlib.h>
 #include <sys/types.h>
 #include <unistd.h>
diff --git a/tools/perf/tests/thread-mg-share.c b/tools/perf/tests/thread-mg-share.c
index b9c7f58..b1d1bba 100644
--- a/tools/perf/tests/thread-mg-share.c
+++ b/tools/perf/tests/thread-mg-share.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "tests.h"
 #include "machine.h"
 #include "thread.h"
diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index 19b0561..a59db7c 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/perf/tests/unit_number__scnprintf.c b/tools/perf/tests/unit_number__scnprintf.c
index 15cd1cf..2bb8cb0 100644
--- a/tools/perf/tests/unit_number__scnprintf.c
+++ b/tools/perf/tests/unit_number__scnprintf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <linux/compiler.h>
 #include <linux/types.h>
diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c
index 86cb886..f6789fb 100644
--- a/tools/perf/tests/vmlinux-kallsyms.c
+++ b/tools/perf/tests/vmlinux-kallsyms.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/rbtree.h>
 #include <inttypes.h>
diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h
index 4b58581..d80655c 100644
--- a/tools/perf/trace/beauty/beauty.h
+++ b/tools/perf/trace/beauty/beauty.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_TRACE_BEAUTY_H
 #define _PERF_TRACE_BEAUTY_H
 
diff --git a/tools/perf/trace/beauty/eventfd.c b/tools/perf/trace/beauty/eventfd.c
index b08f21e..5d6a477 100644
--- a/tools/perf/trace/beauty/eventfd.c
+++ b/tools/perf/trace/beauty/eventfd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #ifndef EFD_SEMAPHORE
 #define EFD_SEMAPHORE		1
 #endif
diff --git a/tools/perf/trace/beauty/flock.c b/tools/perf/trace/beauty/flock.c
index 7461370..f9707f5 100644
--- a/tools/perf/trace/beauty/flock.c
+++ b/tools/perf/trace/beauty/flock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <fcntl.h>
 
 #ifndef LOCK_MAND
diff --git a/tools/perf/trace/beauty/futex_op.c b/tools/perf/trace/beauty/futex_op.c
index bfd3359..61850fb 100644
--- a/tools/perf/trace/beauty/futex_op.c
+++ b/tools/perf/trace/beauty/futex_op.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/futex.h>
 
 #ifndef FUTEX_WAIT_BITSET
diff --git a/tools/perf/trace/beauty/mmap.c b/tools/perf/trace/beauty/mmap.c
index 754558f..51f1cea 100644
--- a/tools/perf/trace/beauty/mmap.c
+++ b/tools/perf/trace/beauty/mmap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <uapi/linux/mman.h>
 
 static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
diff --git a/tools/perf/trace/beauty/mode_t.c b/tools/perf/trace/beauty/mode_t.c
index 930d8fe..d929ad7 100644
--- a/tools/perf/trace/beauty/mode_t.c
+++ b/tools/perf/trace/beauty/mode_t.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
diff --git a/tools/perf/trace/beauty/msg_flags.c b/tools/perf/trace/beauty/msg_flags.c
index 1106c89..c064d6a 100644
--- a/tools/perf/trace/beauty/msg_flags.c
+++ b/tools/perf/trace/beauty/msg_flags.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <sys/socket.h>
 
diff --git a/tools/perf/trace/beauty/open_flags.c b/tools/perf/trace/beauty/open_flags.c
index e359e04..6aec617 100644
--- a/tools/perf/trace/beauty/open_flags.c
+++ b/tools/perf/trace/beauty/open_flags.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
diff --git a/tools/perf/trace/beauty/perf_event_open.c b/tools/perf/trace/beauty/perf_event_open.c
index 311f09d..2bafd7c 100644
--- a/tools/perf/trace/beauty/perf_event_open.c
+++ b/tools/perf/trace/beauty/perf_event_open.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #ifndef PERF_FLAG_FD_NO_GROUP
 # define PERF_FLAG_FD_NO_GROUP		(1UL << 0)
 #endif
diff --git a/tools/perf/trace/beauty/pid.c b/tools/perf/trace/beauty/pid.c
index b6d419e..0313df3 100644
--- a/tools/perf/trace/beauty/pid.c
+++ b/tools/perf/trace/beauty/pid.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 size_t syscall_arg__scnprintf_pid(char *bf, size_t size, struct syscall_arg *arg)
 {
 	int pid = arg->val;
diff --git a/tools/perf/trace/beauty/sched_policy.c b/tools/perf/trace/beauty/sched_policy.c
index 3477529..ba5096a 100644
--- a/tools/perf/trace/beauty/sched_policy.c
+++ b/tools/perf/trace/beauty/sched_policy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sched.h>
 
 /*
diff --git a/tools/perf/trace/beauty/seccomp.c b/tools/perf/trace/beauty/seccomp.c
index 356441b..b7097fd 100644
--- a/tools/perf/trace/beauty/seccomp.c
+++ b/tools/perf/trace/beauty/seccomp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #ifndef SECCOMP_SET_MODE_STRICT
 #define SECCOMP_SET_MODE_STRICT 0
 #endif
diff --git a/tools/perf/trace/beauty/signum.c b/tools/perf/trace/beauty/signum.c
index fde8f2f..bde18a5 100644
--- a/tools/perf/trace/beauty/signum.c
+++ b/tools/perf/trace/beauty/signum.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <signal.h>
 
 static size_t syscall_arg__scnprintf_signum(char *bf, size_t size, struct syscall_arg *arg)
diff --git a/tools/perf/trace/beauty/socket_type.c b/tools/perf/trace/beauty/socket_type.c
index 0a5ce81..bca26ae 100644
--- a/tools/perf/trace/beauty/socket_type.c
+++ b/tools/perf/trace/beauty/socket_type.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <sys/socket.h>
 
diff --git a/tools/perf/trace/beauty/waitid_options.c b/tools/perf/trace/beauty/waitid_options.c
index 7942724..8465281 100644
--- a/tools/perf/trace/beauty/waitid_options.c
+++ b/tools/perf/trace/beauty/waitid_options.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <sys/wait.h>
 
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index d0c2007..63399af 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../util.h"
 #include "../string2.h"
 #include "../config.h"
diff --git a/tools/perf/ui/browser.h b/tools/perf/ui/browser.h
index a12eff7..03e1734 100644
--- a/tools/perf/ui/browser.h
+++ b/tools/perf/ui/browser.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_BROWSER_H_
 #define _PERF_UI_BROWSER_H_ 1
 
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 786feca..8f7f59d 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../../util/util.h"
 #include "../browser.h"
 #include "../helpline.h"
diff --git a/tools/perf/ui/browsers/header.c b/tools/perf/ui/browsers/header.c
index e2c9390..d754921 100644
--- a/tools/perf/ui/browsers/header.c
+++ b/tools/perf/ui/browsers/header.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util/cache.h"
 #include "util/debug.h"
 #include "ui/browser.h"
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 13dfb0a..628ad5f 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <errno.h>
 #include <inttypes.h>
diff --git a/tools/perf/ui/browsers/hists.h b/tools/perf/ui/browsers/hists.h
index 23d6acb..ba43177 100644
--- a/tools/perf/ui/browsers/hists.h
+++ b/tools/perf/ui/browsers/hists.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_BROWSER_HISTS_H_
 #define _PERF_UI_BROWSER_HISTS_H_ 1
 
diff --git a/tools/perf/ui/browsers/map.c b/tools/perf/ui/browsers/map.c
index ffa5add..e03fa75 100644
--- a/tools/perf/ui/browsers/map.c
+++ b/tools/perf/ui/browsers/map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elf.h>
 #include <inttypes.h>
 #include <sys/ttydefaults.h>
diff --git a/tools/perf/ui/browsers/map.h b/tools/perf/ui/browsers/map.h
index 2d58e4b..0ed7dbb 100644
--- a/tools/perf/ui/browsers/map.h
+++ b/tools/perf/ui/browsers/map.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_MAP_BROWSER_H_
 #define _PERF_UI_MAP_BROWSER_H_ 1
 struct map;
diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c
index ad6b6ee..90a32ac 100644
--- a/tools/perf/ui/browsers/scripts.c
+++ b/tools/perf/ui/browsers/scripts.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elf.h>
 #include <inttypes.h>
 #include <sys/ttydefaults.h>
diff --git a/tools/perf/ui/gtk/annotate.c b/tools/perf/ui/gtk/annotate.c
index 0217619..fc7a2e1 100644
--- a/tools/perf/ui/gtk/annotate.c
+++ b/tools/perf/ui/gtk/annotate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "gtk.h"
 #include "util/debug.h"
 #include "util/annotate.h"
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index c24d912..4820e25 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../evlist.h"
 #include "../cache.h"
 #include "../evsel.h"
diff --git a/tools/perf/ui/gtk/gtk.h b/tools/perf/ui/gtk/gtk.h
index 0a9173f..9846ea5 100644
--- a/tools/perf/ui/gtk/gtk.h
+++ b/tools/perf/ui/gtk/gtk.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_GTK_H_
 #define _PERF_GTK_H_ 1
 
diff --git a/tools/perf/ui/gtk/helpline.c b/tools/perf/ui/gtk/helpline.c
index 3388cbd..fbf1ea9 100644
--- a/tools/perf/ui/gtk/helpline.c
+++ b/tools/perf/ui/gtk/helpline.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <string.h>
 
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index e24f839..24e1ec2 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../evlist.h"
 #include "../cache.h"
 #include "../evsel.h"
diff --git a/tools/perf/ui/gtk/progress.c b/tools/perf/ui/gtk/progress.c
index b656655..b6ad885 100644
--- a/tools/perf/ui/gtk/progress.c
+++ b/tools/perf/ui/gtk/progress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 
 #include "gtk.h"
diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
index 1d57676..506e73b 100644
--- a/tools/perf/ui/gtk/setup.c
+++ b/tools/perf/ui/gtk/setup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "gtk.h"
 #include "../../util/cache.h"
 #include "../../util/debug.h"
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
index 00b9192..7250d81 100644
--- a/tools/perf/ui/gtk/util.c
+++ b/tools/perf/ui/gtk/util.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../util.h"
 #include "../../util/util.h"
 #include "../../util/debug.h"
diff --git a/tools/perf/ui/helpline.c b/tools/perf/ui/helpline.c
index 379039a..b3c4214 100644
--- a/tools/perf/ui/helpline.c
+++ b/tools/perf/ui/helpline.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/perf/ui/helpline.h b/tools/perf/ui/helpline.h
index d52d0a1..8f775a0 100644
--- a/tools/perf/ui/helpline.h
+++ b/tools/perf/ui/helpline.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_HELPLINE_H_
 #define _PERF_UI_HELPLINE_H_ 1
 
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index db79017..706f6f1 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <math.h>
 #include <linux/compiler.h>
diff --git a/tools/perf/ui/keysyms.h b/tools/perf/ui/keysyms.h
index 65092d5..fbfac2907 100644
--- a/tools/perf/ui/keysyms.h
+++ b/tools/perf/ui/keysyms.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_KEYSYMS_H_
 #define _PERF_KEYSYMS_H_ 1
 
diff --git a/tools/perf/ui/libslang.h b/tools/perf/ui/libslang.h
index db81669..c0686cd 100644
--- a/tools/perf/ui/libslang.h
+++ b/tools/perf/ui/libslang.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_SLANG_H_
 #define _PERF_UI_SLANG_H_ 1
 /*
diff --git a/tools/perf/ui/progress.c b/tools/perf/ui/progress.c
index ae91c81..b5a5df1 100644
--- a/tools/perf/ui/progress.c
+++ b/tools/perf/ui/progress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
 #include "../cache.h"
 #include "progress.h"
diff --git a/tools/perf/ui/progress.h b/tools/perf/ui/progress.h
index 717d39d..594bbe6 100644
--- a/tools/perf/ui/progress.h
+++ b/tools/perf/ui/progress.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_PROGRESS_H_
 #define _PERF_UI_PROGRESS_H_ 1
 
diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
index caf1ce6f..44fe824 100644
--- a/tools/perf/ui/setup.c
+++ b/tools/perf/ui/setup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <pthread.h>
 #include <dlfcn.h>
 
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 8bdb7a5..de2810a 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <linux/string.h>
 
diff --git a/tools/perf/ui/tui/helpline.c b/tools/perf/ui/tui/helpline.c
index 88f5143..4ca799a 100644
--- a/tools/perf/ui/tui/helpline.c
+++ b/tools/perf/ui/tui/helpline.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/perf/ui/tui/progress.c b/tools/perf/ui/tui/progress.c
index c4b9900..236bcb6 100644
--- a/tools/perf/ui/tui/progress.c
+++ b/tools/perf/ui/tui/progress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../cache.h"
 #include "../progress.h"
 #include "../libslang.h"
diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
index d9350a1..d4ac416 100644
--- a/tools/perf/ui/tui/setup.c
+++ b/tools/perf/ui/tui/setup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <signal.h>
 #include <stdbool.h>
diff --git a/tools/perf/ui/tui/tui.h b/tools/perf/ui/tui/tui.h
index 18961c7..8de06f6 100644
--- a/tools/perf/ui/tui/tui.h
+++ b/tools/perf/ui/tui/tui.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_TUI_H_
 #define _PERF_TUI_H_ 1
 
diff --git a/tools/perf/ui/tui/util.c b/tools/perf/ui/tui/util.c
index d96ad7c..b9794d6 100644
--- a/tools/perf/ui/tui/util.c
+++ b/tools/perf/ui/tui/util.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../../util/util.h"
 #include <signal.h>
 #include <stdbool.h>
diff --git a/tools/perf/ui/ui.h b/tools/perf/ui/ui.h
index 4b6fb6c..9b6fdf0 100644
--- a/tools/perf/ui/ui.h
+++ b/tools/perf/ui/ui.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_H_
 #define _PERF_UI_H_ 1
 
diff --git a/tools/perf/ui/util.c b/tools/perf/ui/util.c
index e3e0a96..63bf06e 100644
--- a/tools/perf/ui/util.c
+++ b/tools/perf/ui/util.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util.h"
 #include "../debug.h"
 
diff --git a/tools/perf/ui/util.h b/tools/perf/ui/util.h
index 361f08c..5e44223 100644
--- a/tools/perf/ui/util.h
+++ b/tools/perf/ui/util.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UI_UTIL_H_
 #define _PERF_UI_UTIL_H_ 1
 
diff --git a/tools/perf/util/PERF-VERSION-GEN b/tools/perf/util/PERF-VERSION-GEN
index 39f1750..3802cee 100755
--- a/tools/perf/util/PERF-VERSION-GEN
+++ b/tools/perf/util/PERF-VERSION-GEN
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
 
 if [ $# -eq 1 ]  ; then
 	OUTPUT=$1
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 9ce575c..f6ba356 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_ANNOTATE_H
 #define __PERF_ANNOTATE_H
 
diff --git a/tools/perf/util/block-range.c b/tools/perf/util/block-range.c
index 7b3e1d7..f1451c9 100644
--- a/tools/perf/util/block-range.c
+++ b/tools/perf/util/block-range.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "block-range.h"
 #include "annotate.h"
 
diff --git a/tools/perf/util/block-range.h b/tools/perf/util/block-range.h
index a8c8413..a5ba719 100644
--- a/tools/perf/util/block-range.h
+++ b/tools/perf/util/block-range.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_BLOCK_RANGE_H
 #define __PERF_BLOCK_RANGE_H
 
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 4a1264c..72c107f 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * bpf-loader.c
  *
diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h
index 4886386..5d3aefd 100644
--- a/tools/perf/util/bpf-loader.h
+++ b/tools/perf/util/bpf-loader.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
  * Copyright (C) 2015, Huawei Inc.
diff --git a/tools/perf/util/bpf-prologue.c b/tools/perf/util/bpf-prologue.c
index 827f914..2934775 100644
--- a/tools/perf/util/bpf-prologue.c
+++ b/tools/perf/util/bpf-prologue.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * bpf-prologue.c
  *
diff --git a/tools/perf/util/bpf-prologue.h b/tools/perf/util/bpf-prologue.h
index ba56483..c50c735 100644
--- a/tools/perf/util/bpf-prologue.h
+++ b/tools/perf/util/bpf-prologue.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2015, He Kuang <hekuang@huawei.com>
  * Copyright (C) 2015, Huawei Inc.
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index c1a06fc..7f85536 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * build-id.c
  *
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index c94b0dc..f0c5651 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_BUILD_ID_H_
 #define PERF_BUILD_ID_H_ 1
 
diff --git a/tools/perf/util/c++/clang-c.h b/tools/perf/util/c++/clang-c.h
index ccafcf7..e513366 100644
--- a/tools/perf/util/c++/clang-c.h
+++ b/tools/perf/util/c++/clang-c.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_UTIL_CLANG_C_H
 #define PERF_UTIL_CLANG_C_H
 
diff --git a/tools/perf/util/c++/clang-test.cpp b/tools/perf/util/c++/clang-test.cpp
index 9b11e8c..a4014d7 100644
--- a/tools/perf/util/c++/clang-test.cpp
+++ b/tools/perf/util/c++/clang-test.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "clang.h"
 #include "clang-c.h"
 #include "llvm/IR/Function.h"
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index 1e97415..1bfc946 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * llvm C frontend for perf. Support dynamically compile C file
  *
diff --git a/tools/perf/util/c++/clang.h b/tools/perf/util/c++/clang.h
index dd8b042..6ce33e2 100644
--- a/tools/perf/util/c++/clang.h
+++ b/tools/perf/util/c++/clang.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_UTIL_CLANG_H
 #define PERF_UTIL_CLANG_H
 
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 0175765..9f2e36e 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_CACHE_H
 #define __PERF_CACHE_H
 
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index a971caf..6031933 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2009-2011, Frederic Weisbecker <fweisbec@gmail.com>
  *
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 1ed6fc6..f967aa4 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_CALLCHAIN_H
 #define __PERF_CALLCHAIN_H
 
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 0e77bc9e5..d9ffc1e 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util.h"
 #include "../perf.h"
 #include <subcmd/parse-options.h>
diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h
index d91966b..afafc87 100644
--- a/tools/perf/util/cgroup.h
+++ b/tools/perf/util/cgroup.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __CGROUP_H__
 #define __CGROUP_H__
 
diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index 4b4f00d..ca0fff6 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <sched.h>
 #include "util.h"
diff --git a/tools/perf/util/cloexec.h b/tools/perf/util/cloexec.h
index 94a5a7d..78216b1 100644
--- a/tools/perf/util/cloexec.h
+++ b/tools/perf/util/cloexec.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_CLOEXEC_H
 #define __PERF_CLOEXEC_H
 
diff --git a/tools/perf/util/color.c b/tools/perf/util/color.c
index dbbf89b..39e628b 100644
--- a/tools/perf/util/color.c
+++ b/tools/perf/util/color.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
 #include "cache.h"
 #include "config.h"
diff --git a/tools/perf/util/color.h b/tools/perf/util/color.h
index 52122bc..22777b18 100644
--- a/tools/perf/util/color.h
+++ b/tools/perf/util/color.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_COLOR_H
 #define __PERF_COLOR_H
 
diff --git a/tools/perf/util/comm.c b/tools/perf/util/comm.c
index 7bc981b..8808570 100644
--- a/tools/perf/util/comm.c
+++ b/tools/perf/util/comm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "comm.h"
 #include "util.h"
 #include <errno.h>
diff --git a/tools/perf/util/comm.h b/tools/perf/util/comm.h
index 71c9c39..3e5c438 100644
--- a/tools/perf/util/comm.h
+++ b/tools/perf/util/comm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_COMM_H
 #define __PERF_COMM_H
 
diff --git a/tools/perf/util/compress.h b/tools/perf/util/compress.h
index 67fd1bb..ecca688 100644
--- a/tools/perf/util/compress.h
+++ b/tools/perf/util/compress.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_COMPRESS_H
 #define PERF_COMPRESS_H
 
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index bc75596..4b893c6 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * config.c
  *
diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
index b6bb11f..baf82bf 100644
--- a/tools/perf/util/config.h
+++ b/tools/perf/util/config.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_CONFIG_H
 #define __PERF_CONFIG_H
 
diff --git a/tools/perf/util/counts.c b/tools/perf/util/counts.c
index c4af82a..03032b4 100644
--- a/tools/perf/util/counts.c
+++ b/tools/perf/util/counts.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <stdlib.h>
 #include "evsel.h"
diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h
index cb45a6a..0d1050c 100644
--- a/tools/perf/util/counts.h
+++ b/tools/perf/util/counts.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_COUNTS_H
 #define __PERF_COUNTS_H
 
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 37b3bb7..1ccbd33 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util.h"
 #include <api/fs/fs.h>
 #include "../perf.h"
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 6b8bff8..ed8999d 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_CPUMAP_H
 #define __PERF_CPUMAP_H
 
diff --git a/tools/perf/util/ctype.c b/tools/perf/util/ctype.c
index 4b261c2..ee4c1e8 100644
--- a/tools/perf/util/ctype.c
+++ b/tools/perf/util/ctype.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Sane locale-independent, ASCII ctype.
  *
diff --git a/tools/perf/util/data-convert-bt.h b/tools/perf/util/data-convert-bt.h
index 9a3b587..821674d 100644
--- a/tools/perf/util/data-convert-bt.h
+++ b/tools/perf/util/data-convert-bt.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __DATA_CONVERT_BT_H
 #define __DATA_CONVERT_BT_H
 #include "data-convert.h"
diff --git a/tools/perf/util/data-convert.h b/tools/perf/util/data-convert.h
index 5314962..af90b60 100644
--- a/tools/perf/util/data-convert.h
+++ b/tools/perf/util/data-convert.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __DATA_CONVERT_H
 #define __DATA_CONVERT_H
 
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 263f5a90..7919275 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <sys/types.h>
diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index ae510ce..80241ba 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_DATA_H
 #define __PERF_DATA_H
 
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index a5b3777..dc8b53b 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* For general debugging purposes */
 
 #include "../perf.h"
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index c818bdb..77445df 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* For debugging general purposes */
 #ifndef __PERF_DEBUG_H
 #define __PERF_DEBUG_H
diff --git a/tools/perf/util/demangle-java.c b/tools/perf/util/demangle-java.c
index cb66d33..e4c4867 100644
--- a/tools/perf/util/demangle-java.c
+++ b/tools/perf/util/demangle-java.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/perf/util/demangle-java.h b/tools/perf/util/demangle-java.h
index a981c1f..f936c8e 100644
--- a/tools/perf/util/demangle-java.h
+++ b/tools/perf/util/demangle-java.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_DEMANGLE_JAVA
 #define __PERF_DEMANGLE_JAVA 1
 /*
diff --git a/tools/perf/util/demangle-rust.c b/tools/perf/util/demangle-rust.c
index f9dafa8..423afbb 100644
--- a/tools/perf/util/demangle-rust.c
+++ b/tools/perf/util/demangle-rust.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <string.h>
 #include "util.h"
 #include "debug.h"
diff --git a/tools/perf/util/demangle-rust.h b/tools/perf/util/demangle-rust.h
index 7b41ead..2fca618 100644
--- a/tools/perf/util/demangle-rust.h
+++ b/tools/perf/util/demangle-rust.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_DEMANGLE_RUST
 #define __PERF_DEMANGLE_RUST 1
 
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index b9e087f..00c98c9 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <asm/bug.h>
 #include <linux/kernel.h>
 #include <sys/time.h>
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index f886141..926ff2e 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_DSO
 #define __PERF_DSO
 
diff --git a/tools/perf/util/dump-insn.c b/tools/perf/util/dump-insn.c
index ffbdb19..10988d3 100644
--- a/tools/perf/util/dump-insn.c
+++ b/tools/perf/util/dump-insn.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include "dump-insn.h"
 
diff --git a/tools/perf/util/dump-insn.h b/tools/perf/util/dump-insn.h
index 90fb115..0e06280 100644
--- a/tools/perf/util/dump-insn.h
+++ b/tools/perf/util/dump-insn.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_DUMP_INSN_H
 #define __PERF_DUMP_INSN_H 1
 
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index c708395..db55edd 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
  *
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 9e21538..6276b34 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "cpumap.h"
 #include "env.h"
 #include "util.h"
diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index b164dfd..1eb35b1 100644
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_ENV_H
 #define __PERF_ENV_H
 
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 1c905ba..fc690fe 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <errno.h>
 #include <inttypes.h>
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index ee7bcc8..5524ee6 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_RECORD_H
 #define __PERF_RECORD_H
 
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index bf2c493..c1750a4 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_EVLIST_H
 #define __PERF_EVLIST_H 1
 
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index dd2c4b5..b4df79d 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_EVSEL_H
 #define __PERF_EVSEL_H 1
 
diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
index 583f3a6..1fd7c2e 100644
--- a/tools/perf/util/evsel_fprintf.c
+++ b/tools/perf/util/evsel_fprintf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
index 400ef9e..0461608 100644
--- a/tools/perf/util/expr.h
+++ b/tools/perf/util/expr.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PARSE_CTX_H
 #define PARSE_CTX_H 1
 
diff --git a/tools/perf/util/find-vdso-map.c b/tools/perf/util/find-vdso-map.c
index 95ef1cf..d7823e3 100644
--- a/tools/perf/util/find-vdso-map.c
+++ b/tools/perf/util/find-vdso-map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 static int find_vdso_map(void **start, void **end)
 {
 	FILE *maps;
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
index 2424bd9..de322d5 100644
--- a/tools/perf/util/genelf.h
+++ b/tools/perf/util/genelf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __GENELF_H__
 #define __GENELF_H__
 
diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
index 0ac2037..9bbcec4 100755
--- a/tools/perf/util/generate-cmdlist.sh
+++ b/tools/perf/util/generate-cmdlist.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
 
 echo "/* Automatically generated by $0 */
 struct cmdname_help
diff --git a/tools/perf/util/group.h b/tools/perf/util/group.h
index 116debe..f36c7e3 100644
--- a/tools/perf/util/group.h
+++ b/tools/perf/util/group.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef GROUP_H
 #define GROUP_H 1
 
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 605bbd5..ba0cea8 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include "util.h"
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index f7a16ee..29ccbfd 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_HEADER_H
 #define __PERF_HEADER_H
 
diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unknown-cmd.c
index 15b9530..4f07a5b 100644
--- a/tools/perf/util/help-unknown-cmd.c
+++ b/tools/perf/util/help-unknown-cmd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "cache.h"
 #include "config.h"
 #include <poll.h>
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index e60d8d8..0974736 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util.h"
 #include "build-id.h"
 #include "hist.h"
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index e60dda2..f6630cb 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_HIST_H
 #define __PERF_HIST_H
 
diff --git a/tools/perf/util/include/asm/asm-offsets.h b/tools/perf/util/include/asm/asm-offsets.h
index ed53894..3aff4cf 100644
--- a/tools/perf/util/include/asm/asm-offsets.h
+++ b/tools/perf/util/include/asm/asm-offsets.h
@@ -1 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* stub */
diff --git a/tools/perf/util/include/asm/cpufeature.h b/tools/perf/util/include/asm/cpufeature.h
index acffd5e..2270481 100644
--- a/tools/perf/util/include/asm/cpufeature.h
+++ b/tools/perf/util/include/asm/cpufeature.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifndef PERF_CPUFEATURE_H
 #define PERF_CPUFEATURE_H
diff --git a/tools/perf/util/include/asm/dwarf2.h b/tools/perf/util/include/asm/dwarf2.h
index afe3819..e9876be 100644
--- a/tools/perf/util/include/asm/dwarf2.h
+++ b/tools/perf/util/include/asm/dwarf2.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifndef PERF_DWARF2_H
 #define PERF_DWARF2_H
diff --git a/tools/perf/util/include/asm/uaccess.h b/tools/perf/util/include/asm/uaccess.h
index d0f72b8..6a6f4b9 100644
--- a/tools/perf/util/include/asm/uaccess.h
+++ b/tools/perf/util/include/asm/uaccess.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_ASM_UACCESS_H_
 #define _PERF_ASM_UACCESS_H_
 
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h
index 43bfd8d..7d99a08 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_DWARF_REGS_H_
 #define _PERF_DWARF_REGS_H_
 
diff --git a/tools/perf/util/include/linux/linkage.h b/tools/perf/util/include/linux/linkage.h
index 06387cf..f01d48a 100644
--- a/tools/perf/util/include/linux/linkage.h
+++ b/tools/perf/util/include/linux/linkage.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifndef PERF_LINUX_LINKAGE_H_
 #define PERF_LINUX_LINKAGE_H_
diff --git a/tools/perf/util/intel-pt-decoder/gen-insn-attr-x86.awk b/tools/perf/util/intel-pt-decoder/gen-insn-attr-x86.awk
index 54e9616..ddd5c4c 100644
--- a/tools/perf/util/intel-pt-decoder/gen-insn-attr-x86.awk
+++ b/tools/perf/util/intel-pt-decoder/gen-insn-attr-x86.awk
@@ -1,4 +1,5 @@
 #!/bin/awk -f
+# SPDX-License-Identifier: GPL-2.0
 # gen-insn-attr-x86.awk: Instruction attribute table generator
 # Written by Masami Hiramatsu <mhiramat@redhat.com>
 #
diff --git a/tools/perf/util/intlist.h b/tools/perf/util/intlist.h
index 020b9ca..85bab873 100644
--- a/tools/perf/util/intlist.h
+++ b/tools/perf/util/intlist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_INTLIST_H
 #define __PERF_INTLIST_H
 
diff --git a/tools/perf/util/jit.h b/tools/perf/util/jit.h
index 3f42ee4..c2582fa 100644
--- a/tools/perf/util/jit.h
+++ b/tools/perf/util/jit.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __JIT_H__
 #define __JIT_H__
 
diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
index 9084930..36483db 100644
--- a/tools/perf/util/jitdump.c
+++ b/tools/perf/util/jitdump.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 #include <errno.h>
diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h
index d01e735..7b1f065 100644
--- a/tools/perf/util/kvm-stat.h
+++ b/tools/perf/util/kvm-stat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_KVM_STAT_H
 #define __PERF_KVM_STAT_H
 
diff --git a/tools/perf/util/levenshtein.c b/tools/perf/util/levenshtein.c
index f616e4f..a217ecf 100644
--- a/tools/perf/util/levenshtein.c
+++ b/tools/perf/util/levenshtein.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "levenshtein.h"
 #include <errno.h>
 #include <stdlib.h>
diff --git a/tools/perf/util/levenshtein.h b/tools/perf/util/levenshtein.h
index b0fcb6d..34ca173 100644
--- a/tools/perf/util/levenshtein.h
+++ b/tools/perf/util/levenshtein.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_LEVENSHTEIN_H
 #define __PERF_LEVENSHTEIN_H
 
diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
index 6559bc5..66756e6 100644
--- a/tools/perf/util/libunwind/arm64.c
+++ b/tools/perf/util/libunwind/arm64.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file setups defines to compile arch specific binary from the
  * generic one.
diff --git a/tools/perf/util/libunwind/x86_32.c b/tools/perf/util/libunwind/x86_32.c
index 957ffff..c5e5681 100644
--- a/tools/perf/util/libunwind/x86_32.c
+++ b/tools/perf/util/libunwind/x86_32.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file setups defines to compile arch specific binary from the
  * generic one.
diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 209b0c8..4952b42 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
  * Copyright (C) 2015, Huawei Inc.
diff --git a/tools/perf/util/llvm-utils.h b/tools/perf/util/llvm-utils.h
index c87a2a9..d3ad8de 100644
--- a/tools/perf/util/llvm-utils.h
+++ b/tools/perf/util/llvm-utils.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
  * Copyright (C) 2015, Huawei Inc.
diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c
index 4ca7c5c..07498ea 100644
--- a/tools/perf/util/lzma.c
+++ b/tools/perf/util/lzma.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <lzma.h>
 #include <stdio.h>
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index df70936..bd5d5b5 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <errno.h>
 #include <inttypes.h>
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 3cdb134..d551aa8 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_MACHINE_H
 #define __PERF_MACHINE_H
 
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index bdaa0a4..4e7bd27 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "symbol.h"
 #include <errno.h>
 #include <inttypes.h>
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 73aacf7..1fb9b85 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_MAP_H
 #define __PERF_MAP_H
 
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 28afe5f..93f74d8 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index 40f72ee..a889ec2 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_MEM_EVENTS_H
 #define __PERF_MEM_EVENTS_H
 
diff --git a/tools/perf/util/memswap.c b/tools/perf/util/memswap.c
index 55f7faa..c1317e4 100644
--- a/tools/perf/util/memswap.c
+++ b/tools/perf/util/memswap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <byteswap.h>
 #include "memswap.h"
 #include <linux/types.h>
diff --git a/tools/perf/util/memswap.h b/tools/perf/util/memswap.h
index 7d1b1c3..1e29ff9 100644
--- a/tools/perf/util/memswap.h
+++ b/tools/perf/util/memswap.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_MEMSWAP_H_
 #define PERF_MEMSWAP_H_
 
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index 4de398c..8e09fd2 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <linux/list.h>
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index e11468a..96e5292 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ORDERED_EVENTS_H
 #define __ORDERED_EVENTS_H
 
diff --git a/tools/perf/util/parse-branch-options.c b/tools/perf/util/parse-branch-options.c
index e71fb5f..bd779d9 100644
--- a/tools/perf/util/parse-branch-options.c
+++ b/tools/perf/util/parse-branch-options.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "util/util.h"
 #include "util/debug.h"
diff --git a/tools/perf/util/parse-branch-options.h b/tools/perf/util/parse-branch-options.h
index 6086fd9..11d1722 100644
--- a/tools/perf/util/parse-branch-options.h
+++ b/tools/perf/util/parse-branch-options.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_PARSE_BRANCH_OPTIONS_H
 #define _PERF_PARSE_BRANCH_OPTIONS_H 1
 #include <stdint.h>
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 39b1596..56694e3 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/hw_breakpoint.h>
 #include <linux/err.h>
 #include <dirent.h>
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 6351351..eed50b5 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_PARSE_EVENTS_H
 #define __PERF_PARSE_EVENTS_H
 /*
diff --git a/tools/perf/util/parse-regs-options.c b/tools/perf/util/parse-regs-options.c
index 646ecf7..e6599e2 100644
--- a/tools/perf/util/parse-regs-options.c
+++ b/tools/perf/util/parse-regs-options.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "perf.h"
 #include "util/util.h"
 #include "util/debug.h"
diff --git a/tools/perf/util/parse-regs-options.h b/tools/perf/util/parse-regs-options.h
index 7d762b1..cdefb1a 100644
--- a/tools/perf/util/parse-regs-options.h
+++ b/tools/perf/util/parse-regs-options.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_PARSE_REGS_OPTIONS_H
 #define _PERF_PARSE_REGS_OPTIONS_H 1
 struct option;
diff --git a/tools/perf/util/path.c b/tools/perf/util/path.c
index 50ec3bc..933f5c6 100644
--- a/tools/perf/util/path.c
+++ b/tools/perf/util/path.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * I'm tired of doing "vsnprintf()" etc just to open a
  * file, so here's a "return static buffer with printf"
diff --git a/tools/perf/util/path.h b/tools/perf/util/path.h
index 9a276a58..14a254a 100644
--- a/tools/perf/util/path.h
+++ b/tools/perf/util/path.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_PATH_H
 #define _PERF_PATH_H
 
diff --git a/tools/perf/util/perf-hooks.c b/tools/perf/util/perf-hooks.c
index d550929..4f3aa8d 100644
--- a/tools/perf/util/perf-hooks.c
+++ b/tools/perf/util/perf-hooks.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * perf_hooks.c
  *
diff --git a/tools/perf/util/perf-hooks.h b/tools/perf/util/perf-hooks.h
index 838d579..27fbec6 100644
--- a/tools/perf/util/perf-hooks.h
+++ b/tools/perf/util/perf-hooks.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_UTIL_PERF_HOOKS_H
 #define PERF_UTIL_PERF_HOOKS_H
 
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index b2ae039..2acfcc5 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include "perf_regs.h"
 #include "event.h"
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
index 32b37d1..c9319f8 100644
--- a/tools/perf/util/perf_regs.h
+++ b/tools/perf/util/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_REGS_H
 #define __PERF_REGS_H
 
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 1c4d7b4..b10b35a 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/list.h>
 #include <linux/compiler.h>
 #include <sys/types.h>
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index fe0de05..eca9943 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PMU_H
 #define __PMU_H
 
diff --git a/tools/perf/util/print_binary.c b/tools/perf/util/print_binary.c
index e908177..779e35c 100644
--- a/tools/perf/util/print_binary.c
+++ b/tools/perf/util/print_binary.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "print_binary.h"
 #include <linux/log2.h>
 #include "sane_ctype.h"
diff --git a/tools/perf/util/print_binary.h b/tools/perf/util/print_binary.h
index da04272..2be3075 100644
--- a/tools/perf/util/print_binary.h
+++ b/tools/perf/util/print_binary.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_PRINT_BINARY_H
 #define PERF_PRINT_BINARY_H
 
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index 078681d..45b14f0 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PROBE_EVENT_H
 #define _PROBE_EVENT_H
 
diff --git a/tools/perf/util/probe-file.h b/tools/perf/util/probe-file.h
index 2ca4163..63f29b1 100644
--- a/tools/perf/util/probe-file.h
+++ b/tools/perf/util/probe-file.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PROBE_FILE_H
 #define __PROBE_FILE_H
 
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 27f0615..1625298 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PROBE_FINDER_H
 #define _PROBE_FINDER_H
 
diff --git a/tools/perf/util/pstack.c b/tools/perf/util/pstack.c
index b234a6e..797fe1a 100644
--- a/tools/perf/util/pstack.c
+++ b/tools/perf/util/pstack.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Simple pointer stack
  *
diff --git a/tools/perf/util/pstack.h b/tools/perf/util/pstack.h
index ded7f2e..8729b8b 100644
--- a/tools/perf/util/pstack.h
+++ b/tools/perf/util/pstack.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_PSTACK_
 #define _PERF_PSTACK_
 
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index c129e99..8e49d9c 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <Python.h>
 #include <structmember.h>
 #include <inttypes.h>
diff --git a/tools/perf/util/quote.c b/tools/perf/util/quote.c
index 1ba8920..22eaa20 100644
--- a/tools/perf/util/quote.c
+++ b/tools/perf/util/quote.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <stdlib.h>
 #include "strbuf.h"
diff --git a/tools/perf/util/quote.h b/tools/perf/util/quote.h
index 055ca45..274bf26 100644
--- a/tools/perf/util/quote.h
+++ b/tools/perf/util/quote.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_QUOTE_H
 #define __PERF_QUOTE_H
 
diff --git a/tools/perf/util/rb_resort.h b/tools/perf/util/rb_resort.h
index 808cc45..7d8972b 100644
--- a/tools/perf/util/rb_resort.h
+++ b/tools/perf/util/rb_resort.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_RESORT_RB_H_
 #define _PERF_RESORT_RB_H_
 /*
diff --git a/tools/perf/util/rblist.h b/tools/perf/util/rblist.h
index ff9913b..4c8638a 100644
--- a/tools/perf/util/rblist.h
+++ b/tools/perf/util/rblist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_RBLIST_H
 #define __PERF_RBLIST_H
 
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index d91bdf5..1e97937 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "evlist.h"
 #include "evsel.h"
 #include "cpumap.h"
diff --git a/tools/perf/util/sane_ctype.h b/tools/perf/util/sane_ctype.h
index 4308c22..c2b42ff 100644
--- a/tools/perf/util/sane_ctype.h
+++ b/tools/perf/util/sane_ctype.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_SANE_CTYPE_H
 #define _PERF_SANE_CTYPE_H
 
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 76ab070..da55081 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <linux/kernel.h>
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 47b5e7d..41caa09 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_SESSION_H
 #define __PERF_SESSION_H
 
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index eb3ab90..84a33f1 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <regex.h>
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index f36dc49..b2b55e5 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_SORT_H
 #define __PERF_SORT_H
 #include "../builtin.h"
diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index ed8e8d2..4105682 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/perf/util/srcline.h b/tools/perf/util/srcline.h
index 7b52ba8..8e73f607 100644
--- a/tools/perf/util/srcline.h
+++ b/tools/perf/util/srcline.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_SRCLINE_H
 #define PERF_SRCLINE_H
 
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index a04cf56..3736386 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include "evsel.h"
 #include "stat.h"
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 35e9848..c9bae5f 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
 #include <math.h>
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index eacaf95..96326b1 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_STATS_H
 #define __PERF_STATS_H
 
diff --git a/tools/perf/util/strbuf.c b/tools/perf/util/strbuf.c
index aafe908..3d1cf5b 100644
--- a/tools/perf/util/strbuf.c
+++ b/tools/perf/util/strbuf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "debug.h"
 #include "util.h"
 #include <linux/kernel.h>
diff --git a/tools/perf/util/strbuf.h b/tools/perf/util/strbuf.h
index 802d743..ea94d86 100644
--- a/tools/perf/util/strbuf.h
+++ b/tools/perf/util/strbuf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_STRBUF_H
 #define __PERF_STRBUF_H
 
diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
index 4dc0af6..7f3253d 100644
--- a/tools/perf/util/strfilter.c
+++ b/tools/perf/util/strfilter.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "util.h"
 #include "string2.h"
 #include "strfilter.h"
diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h
index cff5eda..e0c25a4 100644
--- a/tools/perf/util/strfilter.h
+++ b/tools/perf/util/strfilter.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_STRFILTER_H
 #define __PERF_STRFILTER_H
 /* General purpose glob matching filter */
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index cca53b6..aaa08ee 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "string2.h"
 #include <linux/kernel.h>
 #include <linux/string.h>
diff --git a/tools/perf/util/string2.h b/tools/perf/util/string2.h
index 2f61968..ee14ca5 100644
--- a/tools/perf/util/string2.h
+++ b/tools/perf/util/string2.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_STRING_H
 #define PERF_STRING_H
 
diff --git a/tools/perf/util/strlist.h b/tools/perf/util/strlist.h
index 19207e5..d58f1e08 100644
--- a/tools/perf/util/strlist.h
+++ b/tools/perf/util/strlist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_STRLIST_H
 #define __PERF_STRLIST_H
 
diff --git a/tools/perf/util/svghelper.h b/tools/perf/util/svghelper.h
index 946fdf2..e55338d 100644
--- a/tools/perf/util/svghelper.h
+++ b/tools/perf/util/svghelper.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_SVGHELPER_H
 #define __PERF_SVGHELPER_H
 
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 9cf781f..2de7705 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <fcntl.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
index 1a5aa35..ff48d0d 100644
--- a/tools/perf/util/symbol-minimal.c
+++ b/tools/perf/util/symbol-minimal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "symbol.h"
 #include "util.h"
 
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 5909ee4..6492ef3 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <errno.h>
 #include <stdlib.h>
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index aad99e7..6352022 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_SYMBOL
 #define __PERF_SYMBOL 1
 
diff --git a/tools/perf/util/symbol_fprintf.c b/tools/perf/util/symbol_fprintf.c
index 63694e1..6dd2cb8 100644
--- a/tools/perf/util/symbol_fprintf.c
+++ b/tools/perf/util/symbol_fprintf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <elf.h>
 #include <inttypes.h>
 #include <stdio.h>
diff --git a/tools/perf/util/syscalltbl.h b/tools/perf/util/syscalltbl.h
index e9fb878..c8e7e9ce 100644
--- a/tools/perf/util/syscalltbl.h
+++ b/tools/perf/util/syscalltbl.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_SYSCALLTBL_H
 #define __PERF_SYSCALLTBL_H
 
diff --git a/tools/perf/util/target.h b/tools/perf/util/target.h
index 7381b1c..446aa7a 100644
--- a/tools/perf/util/target.h
+++ b/tools/perf/util/target.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_TARGET_H
 #define _PERF_TARGET_H
 
diff --git a/tools/perf/util/term.c b/tools/perf/util/term.c
index 8f254a7..e7aa82c 100644
--- a/tools/perf/util/term.c
+++ b/tools/perf/util/term.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "term.h"
 #include <stdlib.h>
 #include <termios.h>
diff --git a/tools/perf/util/term.h b/tools/perf/util/term.h
index 2c06a61..607b170 100644
--- a/tools/perf/util/term.h
+++ b/tools/perf/util/term.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_TERM_H
 #define __PERF_TERM_H
 
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index aee9a42..1dbcd3c 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../perf.h"
 #include <errno.h>
 #include <stdlib.h>
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index cb1a5dd..fdcea7c 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_THREAD_H
 #define __PERF_THREAD_H
 
diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index 63ead7b..be0d5a7 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <dirent.h>
 #include <errno.h>
 #include <limits.h>
diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h
index bd34d7a..f158039 100644
--- a/tools/perf/util/thread_map.h
+++ b/tools/perf/util/thread_map.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_THREAD_MAP_H
 #define __PERF_THREAD_MAP_H
 
diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 5b5d021..81927d0 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdlib.h>
 #include <string.h>
 #include <sys/time.h>
diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h
index 8656be0..15b475c 100644
--- a/tools/perf/util/time-utils.h
+++ b/tools/perf/util/time-utils.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _TIME_UTILS_H_
 #define _TIME_UTILS_H_
 
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index d549e50..2532b55 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_TOOL_H
 #define __PERF_TOOL_H
 
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index 9bdfb78..506150a 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_TOP_H
 #define __PERF_TOP_H 1
 
diff --git a/tools/perf/util/trace-event.c b/tools/perf/util/trace-event.c
index c330780..16a7763 100644
--- a/tools/perf/util/trace-event.c
+++ b/tools/perf/util/trace-event.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 1fbc044..dcbdb53 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_UTIL_TRACE_EVENT_H
 #define _PERF_UTIL_TRACE_EVENT_H
 
diff --git a/tools/perf/util/trigger.h b/tools/perf/util/trigger.h
index e97d701..370138e 100644
--- a/tools/perf/util/trigger.h
+++ b/tools/perf/util/trigger.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __TRIGGER_H_
 #define __TRIGGER_H_ 1
 
diff --git a/tools/perf/util/tsc.c b/tools/perf/util/tsc.c
index 1b74164..bfa7824 100644
--- a/tools/perf/util/tsc.c
+++ b/tools/perf/util/tsc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/types.h>
 
diff --git a/tools/perf/util/tsc.h b/tools/perf/util/tsc.h
index d5b11e2..e0c3af3 100644
--- a/tools/perf/util/tsc.h
+++ b/tools/perf/util/tsc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_TSC_H
 #define __PERF_TSC_H
 
diff --git a/tools/perf/util/units.c b/tools/perf/util/units.c
index 4767ec2..a46762a 100644
--- a/tools/perf/util/units.c
+++ b/tools/perf/util/units.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "units.h"
 #include <inttypes.h>
 #include <limits.h>
diff --git a/tools/perf/util/units.h b/tools/perf/util/units.h
index f02c873..99263b6 100644
--- a/tools/perf/util/units.h
+++ b/tools/perf/util/units.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef PERF_UNIT_H
 #define PERF_UNIT_H
 
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index 7755a5e0..1e9c974 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <elfutils/libdw.h>
 #include <elfutils/libdwfl.h>
diff --git a/tools/perf/util/unwind-libdw.h b/tools/perf/util/unwind-libdw.h
index 4a2b269..0cbd265 100644
--- a/tools/perf/util/unwind-libdw.h
+++ b/tools/perf/util/unwind-libdw.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_UNWIND_LIBDW_H
 #define __PERF_UNWIND_LIBDW_H
 
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 672c2ad..7a42f70 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Post mortem Dwarf CFI based unwinding on top of regs and stack dumps.
  *
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 8aef572..647a1e6 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "unwind.h"
 #include "thread.h"
 #include "session.h"
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index bfbdcc6..8a44a15 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __UNWIND_H
 #define __UNWIND_H
 
diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c
index 6cc9d98..070d25c 100644
--- a/tools/perf/util/usage.c
+++ b/tools/perf/util/usage.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * usage.c
  *
diff --git a/tools/perf/util/util-cxx.h b/tools/perf/util/util-cxx.h
index 0e0e019..80a99e4 100644
--- a/tools/perf/util/util-cxx.h
+++ b/tools/perf/util/util-cxx.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Support C++ source use utilities defined in util.h
  */
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 4c360da..3687b72 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "../perf.h"
 #include "util.h"
 #include "debug.h"
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index b136c27..b52765e 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef GIT_COMPAT_UTIL_H
 #define GIT_COMPAT_UTIL_H
 
diff --git a/tools/perf/util/values.c b/tools/perf/util/values.c
index 8a32bb0..4b7a303 100644
--- a/tools/perf/util/values.c
+++ b/tools/perf/util/values.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/perf/util/values.h b/tools/perf/util/values.h
index 808ff9c..8c41f22 100644
--- a/tools/perf/util/values.h
+++ b/tools/perf/util/values.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_VALUES_H
 #define __PERF_VALUES_H
 
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index d3c39ee..cffcda4 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/perf/util/vdso.h b/tools/perf/util/vdso.h
index cdc4fab..bc74ace 100644
--- a/tools/perf/util/vdso.h
+++ b/tools/perf/util/vdso.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __PERF_VDSO__
 #define __PERF_VDSO__
 
diff --git a/tools/perf/util/xyarray.c b/tools/perf/util/xyarray.c
index c8f415d..dc95154 100644
--- a/tools/perf/util/xyarray.c
+++ b/tools/perf/util/xyarray.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include "xyarray.h"
 #include "util.h"
 #include <stdlib.h>
diff --git a/tools/perf/util/xyarray.h b/tools/perf/util/xyarray.h
index 54af6046..7ffe562 100644
--- a/tools/perf/util/xyarray.h
+++ b/tools/perf/util/xyarray.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PERF_XYARRAY_H_
 #define _PERF_XYARRAY_H_ 1
 
diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c
index 1329d84..008fe68 100644
--- a/tools/perf/util/zlib.c
+++ b/tools/perf/util/zlib.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include <unistd.h>
 #include <sys/stat.h>
author	Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2017-11-01 15:07:57 +0100
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2017-11-02 11:10:55 +0100
commit	b24413180f5600bcb3bb70fbed5cf186b60864bd (patch)
tree	4ebcae0dab27ee8bfcecb9a5daf65353c6dd7ed6 /tools/perf
parent	bb176f67090ca54869fc1262c913aa69d2ede070 (diff)
download	op-kernel-dev-b24413180f5600bcb3bb70fbed5cf186b60864bd.zip op-kernel-dev-b24413180f5600bcb3bb70fbed5cf186b60864bd.tar.gz